code: def ui(host, port, workers, config_path):
      """This command launches the web interface for NeuralQA."""
      logging.basicConfig()
      logging.getLogger().setLevel(logging.INFO)
      logging.getLogger(__name__).setLevel(logging.INFO)
      if config_path:
          os.environ["NEURALQA_CONFIG_PATH"] = config_path
      launch_server(host, port, workers)
  
file_path: neuralqa/neuralqa/cli.py
imports: import click
  from neuralqa.server import launch_server
  from neuralqa.utils import cli_args
  from neuralqa.utils import import_sample_data, ConfigParser
  import os
  from neuralqa.retriever import RetrieverPool
  import logging
label_desc: Use image node_id 3 for calling a global function with example usage: ui(host, port, workers, config_path) without return types